Exploring wireless LEDs with schematic and waveforms

These wireless LEDs seem to be aimed at modellers to allow them to add lights to models without any complex wiring. They work well, but are not bright. Fine for low level indoor lighting though, and the power use is less than one watt.

I've seen other videos about them, but they don't go into much technical detail, so here's the video that does.

It's intriguing that the system is based around a standard chip designed for inductive charging. It looks as though it could have other transformer drive applications too.

Here's a link to the aliexpress listing I bought the coil from. It wasn't shown as being shipped with LEDs, but did come with some in my order. The current price is £5.78 plus shipping.
https://www.aliexpress.com/item/40012...

The MOSFET package on the PCB remained cool throughout my experiments, even when I put over 100 LEDs inside the loop and the current doubled. It was typically about 15C above ambient room temperature.

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